import java.util.Locale;

public class Test {
    public static void main(String[] args) {
        int a = 123;
        String str = String.valueOf(a);
        System.out.println(str);
        String str1 = "hello";
        String ret = str1.toUpperCase();
        System.out.println(ret);
    }
    public static void main1(String[] args) {
        String str = "abcdefg";
        /*char ch = str.charAt(3);
        System.out.println(ch);*/
        for(int i = 0; i < str.length(); i++){
            char ch = str.charAt(i);
            System.out.print(ch + " ");
        }
        System.out.println("======================");
        int i = str.indexOf('c');
        System.out.println(i);
    }
}
